FR2570644A1 - Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained - Google Patents

Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained Download PDF

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Publication number
FR2570644A1
FR2570644A1 FR8406438A FR8406438A FR2570644A1 FR 2570644 A1 FR2570644 A1 FR 2570644A1 FR 8406438 A FR8406438 A FR 8406438A FR 8406438 A FR8406438 A FR 8406438A FR 2570644 A1 FR2570644 A1 FR 2570644A1
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France
Prior art keywords
sheet
line
plastic sheet
hinge
rigid
Prior art date
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Withdrawn
Application number
FR8406438A
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French (fr)
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to FR8406438A priority Critical patent/FR2570644A1/en
Publication of FR2570644A1 publication Critical patent/FR2570644A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • B29C53/06—Forming folding lines by pressing or scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722—Fixing strips to surfaces other than edge faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/22—Hinges, pivots

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Process for creating a hinge-forming line of weakness on a plastic sheet and product obtained by this process. The invention relates to a process enabling a plastic sheet to be folded about a predetermined line and for this sheet to be able to be folded a very large number of times. This process consists in welding, using a high-frequency or ultrasonic process, along the desired line of weakness I on the rigid plastic sheet F, a flexible plastic sheet E and in thinning down the rigid plastic sheet F along the entire length of the line I. The process according to the invention is particularly intended for the manufacture of stationery and packaging articles.

Description

La présente invention concerne un procédé d'assouplissement d'une ligne d'une feuille de plastique en PVC
Pour fabriquer soit des boites pliantes transparentes on utilise des feuilles de PVC dont l'épaisseur varie entre 150 et 400 microns.The present invention relates to a method of softening a line of a PVC plastic sheet
To manufacture either transparent folding boxes, PVC sheets are used, the thickness of which varies between 150 and 400 microns.

Ce PVC est un PVC de qualité rigide pour avoir une tenue finale de la boite.This PVC is a rigid quality PVC to have a final hold of the box.

Pour réaliser de telles boites il est nécessaire de réaliser des découpes de PVC, de créer sur cette découpe des lignes d'affaiblissement pour plier la découpe autour de ces lignes.To make such boxes it is necessary to make PVC cutouts, to create weakening lines on this cutout to fold the cutout around these lines.

La technique de découpe est parfaitement connue de l'homme de l'art
On réalise de telles découpes avec des outiles appelés forme de découpe et des presses platine utilisées pour le cartonnage.The cutting technique is perfectly known to those skilled in the art
Such cuts are made with tools called cutting form and platen presses used for cardboard.

Les lignes d'affaiblissement sont effectuées en diminuant 1 épaisseur du PVC le long de ces lignes par différentes techniques. On presse avec un filet métallique sur le PVC à l 'endroit où l ton veut amaincir la matière, cette opération peut se faire à froid ou à chaud ; à chaud, on utilise une énergie soit thermique en chauffant le filet, soit une source haute fréquence en plaçant une source haute fréquence entre le filet et la platine supportant la découpe du P VC. The weakening lines are made by decreasing the thickness of the PVC along these lines by different techniques. We press with a metallic thread on the PVC where the tone wants to overcome the material, this operation can be done cold or hot; when hot, either thermal energy is used by heating the net, or a high frequency source by placing a high frequency source between the net and the plate supporting the cutting of the P VC.

Ces différentes méthodes donnent bien une ligne d'affaiblissement permettant de plier la matière autour de cette ligne. Cependant, cette charnière créée par l tamainssissem ent d tune m matière rigide présente une faible solidité et ne permet pas un nombre de pliage important autour de cette charnière avant rupture.These different methods give a line of weakness allowing the material to be folded around this line. However, this hinge created by the tamainssissem ent of a rigid material has a weak solidity and does not allow a large number of folding around this hinge before breaking.

Le procédé selon l'invention permet d'obtenir une charnière trés souple et d'une trés grande solidité. Ce procédé consiste à substituer à l'endroit de la charnière la matière rigide par une matière souple.The method according to the invention makes it possible to obtain a very flexible hinge and of very great solidity. This process consists in replacing the rigid material at the location of the hinge with a flexible material.

Pour cela, sur une presse comportant une platine metalli que A, on place une feuille isolante trés rigide, de la bakelité C par exemple, comportant une gorge D de la forme de la charnière que l ton veut obtenir, au dessus de cette gorge on a un filet B qui est la reproduct < ion en positif de la gorge D mais dont 1 'épaisseur est moindre que la largeur de la gorge. For this, on a press comprising a metal plate that A, a very rigid insulating sheet is placed, of bakelity C for example, comprising a groove D of the shape of the hinge that the tone wants to obtain, above this groove we has a thread B which is the positive reproduction of the groove D but whose thickness is less than the width of the groove.

Cette épaisseur depend de l'épaisseur de la matière sur laquelle on veut créer une charnière.This thickness depends on the thickness of the material on which we want to create a hinge.

On place sur la bakélite C, de façon à recouvrir la gorge D d#un film de PVC souple E dont lîépaisseur sera comprise entre 100 et 200 microns, et 1 'ion place ensuite la feuille de plastique rigide F à l'endroit où l'on veut réaliser la charnière. L'épaisseur de cette feuille variant de 150 à 500 microns selon 1 'utilisation.It is placed on the bakelite C, so as to cover the groove D # with a flexible PVC film E, the thickness of which will be between 100 and 200 microns, and the ion then places the rigid plastic sheet F at the place where the 'we want to realize the hinge. The thickness of this sheet varying from 150 to 500 microns depending on the use.

On descend le filet B en pression sur le sandwich ainsi réalisé ; le filet B est chauffé aux environs de 100 à 200 o c. La pression conjuguée à la chaleur du filet ramollit le PVC rigide. Une fois ce ramollissement effectué, on crée entre B etA un champ haute fréquence qui chauffe préférentiellement le PVC rigide et ainsi on chasse la matière de la feuille F et on soude la feuille F et E ensembles.The thread B is lowered under pressure on the sandwich thus produced; fillet B is heated to around 100 to 200 o c. The pressure combined with the heat of the net softens the rigid PVC. Once this softening has been carried out, a high frequency field is created between B and A which preferentially heats the rigid PVC and thus the material from the sheet F is expelled and the sheet F and E are welded together.

La première opération de ramolleissement de la feuille F est presque instantanée, l'opération de soudage dépend de la puissance HF et de la pression mais n #exède pas 1 seconde.The first softening operation of the sheet F is almost instantaneous, the welding operation depends on the HF power and the pressure but does not take longer than 1 second.

A la fin de l'opération on obtient la configuration réalisée sur la figure 2. La matière F est trés amaincie, tandis que la matière souple E a gardé pratiquement son épaiss#eur et est soudée sur le
PVC rigide F. Nous avons ainsi crée sur toute la ligne du filet une charnière I constituèe en grande partie par le PVC souple.At the end of the operation, the configuration obtained in FIG. 2 is obtained. The material F is very much defeated, while the flexible material E has practically kept its thickness # eur and is welded to the
Rigid PVC F. We have thus created a hinge I along the entire line of the net, made up largely of flexible PVC.

Sur la figure 3 nous avons représenté la réalisation d'un classeur. In Figure 3 we have shown the production of a filing cabinet.

Nous avons une couverture réalisée avec un PVC rigide de 400 microns
Sur les deux lignes A et B nous avons créé des lignes d'affaiblis- sement, nous avons utilisé une seule feuille de PVC souple E pour renforcer les charnières A et B et ainsi nous avons créé une poche entre la couverture, la feuille de plastique souple et les lignes A et B de telle sorte que nous pouvons glisser une étiquette dans cette poche où peut se mettre la référance du contenu du classeur par exemple.We have a cover made with a rigid PVC of 400 microns
On the two lines A and B we created weakening lines, we used a single sheet of flexible PVC E to reinforce the hinges A and B and thus we created a pocket between the cover, the plastic sheet flexible and lines A and B so that we can put a label in this pocket where the reference for the content of the workbook can be placed, for example.

Le procédé selon 1 invention est particulièrement destiné à fabriqués des classeurs, chemises de classement et emballages. The method according to 1 invention is particularly intended for manufacturing binders, filing folders and packaging.

Claims (4)

- REVENDICATIONS- CLAIMS 1 - Procédé pour créer sur une feuille de plastique en chlorure de1 - Process for creating on a plastic sheet in chloride of polyvinylidéne rigide une ligne d 'affaiblissem ent qui perm et de plier rigid polyvinylidene a line of weakening that allows and bends cette feuille autour de cette ligne caractérisée en ce qu'il consiste this sheet around this line characterized in that it consists à rapporter sur la ligne que l'on veut créer une feuille de chlorure de to report on the line that we want to create a chloride sheet polyvinylidéne souple par soudage et que conjointement au soudage flexible polyvinylidene by welding and only in conjunction with welding on désépaissit fortement t au moins 70 % de son épaisseur J la feuille we strongly thicken t at least 70% of its thickness J the sheet de chlorure de polyvinylidéne rigide. rigid polyvinylidene chloride. 2 - Feuille de plastique transformée selon la revendication 1 caractérisée 2 - transformed plastic sheet according to claim 1 characterized en ce quelle comporte 1 ligne d'affaiblissement.  in which it has 1 line of weakening. 3 - Feuille de plastique transformée selon la revendication 1 caractérisée3 - plastic sheet transformed according to claim 1 characterized en ce qu'elle comporte deux lignes d'affaiblissement A et B et que la in that it has two weakening lines A and B and that the feuille souple venant renforcer ces deux lignes est constituée d'une  flexible sheet reinforcing these two lines consists of a seule feuille. single sheet. 4 - Feuille de plastique transformée selon les revendications 1 et 24 - plastic sheet transformed according to claims 1 and 2 caractérisée en ce que la ligne d'affaiblissement nlest pas droite.  characterized in that the weakening line is not straight.
FR8406438A 1984-04-17 1984-04-17 Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained Withdrawn FR2570644A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8406438A FR2570644A1 (en) 1984-04-17 1984-04-17 Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8406438A FR2570644A1 (en) 1984-04-17 1984-04-17 Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained

Publications (1)

Publication Number Publication Date
FR2570644A1 true FR2570644A1 (en) 1986-03-28

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FR8406438A Withdrawn FR2570644A1 (en) 1984-04-17 1984-04-17 Process for producing a hinge on a sheet of rigid polyvinylidene chloride and product obtained

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009260A2 (en) * 1987-05-26 1988-12-01 Minnesota Mining And Manufacturing Company Method affording an easy opening device for nonwoven thermoplastic fiber envelopes
US6355335B1 (en) * 1999-05-28 2002-03-12 K. Jabat, Inc. Flexible hinge
EP2080607A1 (en) * 2008-01-19 2009-07-22 Koch Pac-Systeme GmbH Method and device for manufacturing a bending edge for blister packets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009260A2 (en) * 1987-05-26 1988-12-01 Minnesota Mining And Manufacturing Company Method affording an easy opening device for nonwoven thermoplastic fiber envelopes
WO1988009260A3 (en) * 1987-05-26 1989-02-09 Minnesota Mining & Mfg Method affording an easy opening device for nonwoven thermoplastic fiber envelopes
US6355335B1 (en) * 1999-05-28 2002-03-12 K. Jabat, Inc. Flexible hinge
US6447889B2 (en) 1999-05-28 2002-09-10 K. Jabot, Inc. Drag shield for a power mower
EP2080607A1 (en) * 2008-01-19 2009-07-22 Koch Pac-Systeme GmbH Method and device for manufacturing a bending edge for blister packets

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